I have created a uniform (nominally square) gird of polygons using the grid tool. I have a road network layer that consists of lines. What I would like to do is iterate over the grid polygons and clip the road network within each square. I can certainly clip the road network out using a single polygon but I would like to automate the process :-) (160+ polygons in the grid!).
Happy to use QGIS 2.14 or 2.18!
Answer
You need to use clip tool, from Processing toolbox -> QGIS geoalgorithms -> Vector overlay tools -> Clip, as follows:
Select the roads as input layer and grid as clipping layer, and select the green arrow beside the clipping grid
The output will be clipped roads based on each grid polygon.
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